Harley Engine
Harley Bike Engine Parts at JJ Motorsports
Rebuild and boost your Harley's engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, piston kits, oil filters, pushrod tubes, and coolers designed for maximum strength, leak-free sealing, and high-performance in extreme conditions. Compatible with Big Twins, Softail, Touring, and more, these components support top-end overhauls, oil management, and durability for street rides or custom builds.
Shop trusted brands like Drag Specialties for magnetic filters and Wiseco for forged pistons. Explore related categories such as Harley air and fuel for carb tuning or Harley drivetrain for transmission upgrades.
Top Harley Engine Products
- DRAG SPECIALTIES Magnetic Ring Oil Filter - Chrome - 3-1/4" 140003HP-BX18 – Captures metal particles with pressure relief.
- WISECO Piston Kit .010 .883 XL K1656 – Forged aluminum with rings, pins, and circlips for rebuilds.
- DRAG SPECIALTIES Pushrod Tube Kit Big Twin 75711 – Includes tubes, clips, cups, and springs for complete engine.
- ULTRACOOL Below Regulator Mount Oil Cooler Stainless Steel RF-2CSS – Fits S&S 111/124/143 engines with machined adapter.
- PAUGHCO Ribbed Teardrop Air Cleaner 701-200 – Chrome-plated aluminum with mini filter.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
KIBBLEWHITE Intake Valve 20-4194
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01If you're pushing your engine to the limit, valve wear isn't something you can ignore—it directly impacts combustion efficiency, heat management, and longevity. The KIBBLEWHITE 20-4194 intake valve...DS198971- SKU:
- DS198971
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE
- LENGTH IMPERIAL:
- 3.885'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- MODEL:
- BLACK DIAMOND™
- HEAD DIAMETER IMPERIAL:
- 1.950'
- STEM DIAMETER IMPERIAL:
- 0.3765'
- TULIP ANGLE:
- 23°
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Intake Valve - Big Twin 20-4171
KIBBLEWHITE
MSRP: $29.81Now: $26.83Was: $29.81Big Twin engines demand valves engineered for sustained high-rpm performance and reliability. The KIBBLEWHITE 20-4171 intake valve combines superior wear resistance with precision flow...DS198972- SKU:
- DS198972
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- LENGTH IMPERIAL:
- 4.445'
- STEM DIAMETER IMPERIAL:
- 0.3100'
- TULIP ANGLE:
- 23°
- HEAD DIAMETER IMPERIAL:
- 1.840'
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $29.81Now: $26.83Was: $29.81 -
On Sale
KIBBLEWHITE Intake Valve - Big Twin 20-4169
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55If you're running a Big Twin engine that demands reliable valve durability under sustained load, the KIBBLEWHITE Intake Valve delivers measurable advantages where it counts—reduced friction, superior...DS198973- SKU:
- DS198973
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- INTAKE
- HEAD DIAMETER IMPERIAL:
- 1.940'
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- LENGTH IMPERIAL:
- 4.400'
- TULIP ANGLE:
- 23°
- RIDING STYLE:
- STREET
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.3107'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Compression Release - M10 - 1.050" 20-21250
KIBBLEWHITE
MSRP: $49.71Now: $44.74Was: $49.71Hot starts can strain your battery and starter motor, especially in high-performance or vintage engines where compression is significant. The KIBBLEWHITE Compression Release valve addresses this by...09500887- SKU:
- 09500887
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- DIAMETER - THREAD SIZE:
- M10 X 1.0
- DIAMETER - THREAD SIZE METRIC:
- M10 X 1.0
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- LENGTH IMPERIAL:
- 1.400'
- PRODUCT NAME:
- VALVE
- TYPE:
- COMPRESSION RELEASE
MSRP: $49.71Now: $44.74Was: $49.71 -
On Sale
KIBBLEWHITE Compression Release - M10 - 1.050" 20-21255
KIBBLEWHITE
MSRP: $49.71Now: $44.74Was: $49.71Hot start procedures can drain your battery and strain your starter motor—especially on high-compression engines. This Kibblewhite compression release valve takes the load off by allowing excess...09500888- SKU:
- 09500888
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- PAIR
- COLOR/FINISH:
- BLACK
- LENGTH IMPERIAL:
- 1.730'
- PRODUCT NAME:
- VALVE
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE:
- M10 X 1.0
- DIAMETER - THREAD SIZE METRIC:
- M10 X 1.0
- RIDING STYLE:
- STREET
- TYPE:
- COMPRESSION RELEASE
MSRP: $49.71Now: $44.74Was: $49.71 -
On Sale
KIBBLEWHITE Compression Release - M10 - 1.050" 20-21260
KIBBLEWHITE
MSRP: $49.71Now: $44.74Was: $49.71Hot starts can drain your battery and wear out starter components unnecessarily—especially on high-compression or forced-induction engines where cranking resistance is already extreme. The...09500889- SKU:
- 09500889
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- PAIR
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE:
- M10 X 1.0
- DIAMETER - THREAD SIZE METRIC:
- M10 X 1.0
- LENGTH IMPERIAL:
- 1.750'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- VALVE
- TYPE:
- COMPRESSION RELEASE
MSRP: $49.71Now: $44.74Was: $49.71 -
On Sale
KIBBLEWHITE Valve Stem Seal - Twin Cam 71030-4
KIBBLEWHITE
MSRP: $10.26Now: $9.23Was: $10.26Valve stem seals are critical to preventing oil from entering your combustion chambers—degraded seals lead to blue smoke, increased oil consumption, and carbon buildup that kills performance. The...09350458- SKU:
- 09350458
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SEAL
- MATERIAL:
- VITON
- UNITS:
- 4 PACK
- RIDING STYLE:
- STREET
- TYPE:
- VALVE STEM
MSRP: $10.26Now: $9.23Was: $10.26 -
On Sale
KIBBLEWHITE Valve Spring Kit - Big Twin 20-20425
KIBBLEWHITE
MSRP: $126.70Now: $114.03Was: $126.70Factory valve springs wear out—and when they do, your engine loses compression and power delivery suffers. The KIBBLEWHITE Valve Spring Kit restores OE performance with premium dual springs...09261441- SKU:
- 09261441
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- RIDING STYLE:
- STREET
- COLLAR MATERIAL:
- STEEL
- MATERIAL:
- STEEL
- SPRING OPEN PRESSURE:
- 270 LB
- SPRING SEAT PRESSURE:
- 127 LB
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT IMPERIAL:
- 0.415'
- TYPE:
- VALVE
MSRP: $126.70Now: $114.03Was: $126.70 -
On Sale
KIBBLEWHITE Exhaust Valve - Big Twin 20-4102
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01If you're running a Big Twin engine that demands reliability under sustained high RPM, valve wear becomes your primary enemy. KIBBLEWHITE's exhaust valve delivers superior durability through a...09261453- SKU:
- 09261453
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- HEAD DIAMETER IMPERIAL:
- 1.750'
- LENGTH IMPERIAL:
- 3.670'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.3760'
- UNITS:
- EACH
- TULIP ANGLE:
- 27°
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Bolt Kit Rocker Stud - M8 20-21045
KIBBLEWHITE
MSRP: $129.95Now: $116.96Was: $129.95Rocker studs endure constant cyclic stress and vibration, making thread integrity absolutely critical to engine reliability. KIBBLEWHITE's rolled-thread design on both the stud and nut ensures...24011107- SKU:
- 24011107
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
MSRP: $129.95Now: $116.96Was: $129.95 -
On Sale
KIBBLEWHITE Cylinder Studs - '99-'17 Twin Cam 20-20412
KIBBLEWHITE
MSRP: $187.95Now: $169.16Was: $187.95Stock cylinder studs are a common failure point under sustained high RPM operation and forced induction, making quality replacements essential for any serious Twin Cam build. Kibblewhite's...24010578- SKU:
- 24010578
- Availability:
- Ships Same Business Day
- Weight:
- 1.52 LBS
MSRP: $187.95Now: $169.16Was: $187.95 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2026
KIBBLEWHITE
MSRP: $34.40Now: $30.96Was: $34.40Valve guide wear is one of the most common culprits behind oil burning, loss of compression, and rough idle in Big Twin engines—problems that compound quickly if left unaddressed. The Kibblewhite...09261975- SKU:
- 09261975
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- MATERIAL:
- BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.5710'
- SIZE IMPERIAL:
- OVERSIZE (+0.006')
MSRP: $34.40Now: $30.96Was: $34.40 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2026C
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84Valve guides are critical to maintaining proper valve sealing and preventing excessive wear in your Big Twin engine. Worn or damaged guides compromise compression, increase oil consumption, and can...09261976- SKU:
- 09261976
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- MATERIAL:
- CAST IRON
- OUTSIDE DIAMETER IMPERIAL:
- 0.5710'
- APPLICATION:
- INTAKE
- SIZE IMPERIAL:
- OVERSIZE (+0.006')
- UNITS:
- EACH
MSRP: $9.84Now: $8.86Was: $9.84 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2028
KIBBLEWHITE
MSRP: $34.40Now: $30.96Was: $34.40Valve guide wear is one of the most common culprits behind oil burning, poor compression, and unreliable engine performance on Big Twin motors. The KIBBLEWHITE 20-2028 replaces worn guides with...09261977- SKU:
- 09261977
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.5730'
- SIZE IMPERIAL:
- OVERSIZE (+0.008')
MSRP: $34.40Now: $30.96Was: $34.40 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2028C
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84Valve guides are critical to engine longevity—they maintain precise stem clearance and prevent oil consumption that degrades performance and reliability. The KIBBLEWHITE 20-2028C is...09261978- SKU:
- 09261978
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- OUTSIDE DIAMETER IMPERIAL:
- 0.5730'
- SIZE IMPERIAL:
- OVERSIZE (+0.008')
- MATERIAL:
- CAST IRON
- APPLICATION:
- INTAKE
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $9.84Now: $8.86Was: $9.84 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2029
KIBBLEWHITE
MSRP: $34.40Now: $30.96Was: $34.40Valve guide wear is one of the most common causes of oil consumption and compression loss in Big Twin engines. KIBBLEWHITE's precision-machined nickel bronze guides deliver the heat dissipation and...09261979- SKU:
- 09261979
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- OUTSIDE DIAMETER IMPERIAL:
- 0.5730'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- SIZE IMPERIAL:
- OVERSIZE (+0.010')
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- BRONZE
MSRP: $34.40Now: $30.96Was: $34.40 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2029C
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84Valve guide wear is one of the most common culprits behind oil consumption and poor ring sealing in Big Twin engines. The KIBBLEWHITE 20-2029C restores proper valve stem clearance with...09261980- SKU:
- 09261980
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- OUTSIDE DIAMETER IMPERIAL:
- 0.5750'
- SIZE IMPERIAL:
- OVERSIZE (+0.010')
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- CAST IRON
MSRP: $9.84Now: $8.86Was: $9.84 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2034
KIBBLEWHITE
MSRP: $34.40Now: $30.96Was: $34.40Valve guide wear is one of the most common culprits behind oil consumption, poor sealing, and accelerated valve recession in Big Twin engines. The KIBBLEWHITE 20-2034 is precision-machined from...09261981- SKU:
- 09261981
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- OUTSIDE DIAMETER IMPERIAL:
- 0.5690'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- MATERIAL:
- BRONZE
- SIZE IMPERIAL:
- OVERSIZE (+0.004')
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- UNITS:
- EACH
MSRP: $34.40Now: $30.96Was: $34.40 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2036
KIBBLEWHITE
MSRP: $34.40Now: $30.96Was: $34.40Valve guides are the unsung foundation of reliable top-end performance. The KIBBLEWHITE 20-2036 is precision-machined from a nickel-bronze alloy that resists wear far longer than cast iron, ensuring...09261982- SKU:
- 09261982
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- SIZE IMPERIAL:
- OVERSIZE (+0.006')
- APPLICATION:
- EXHAUST
- MATERIAL:
- BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.5710'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- UNITS:
- EACH
MSRP: $34.40Now: $30.96Was: $34.40 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2036C
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84Valve guides are critical to maintaining proper valve alignment and controlling stem clearance—without precision-machined guides, you're risking accelerated wear, oil consumption, and power loss. The...09261983- SKU:
- 09261983
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- CAST IRON
- OUTSIDE DIAMETER IMPERIAL:
- 0.5710'
- SIZE IMPERIAL:
- OVERSIZE (+0.006')
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
MSRP: $9.84Now: $8.86Was: $9.84
